Responses
It is naseon and chorong's side story which showcases from the extras. I based it on the lezhin covers of the side episodes. I also hope sangjae can have a love interest too, seems like he's caught up with naseon but we all know chorong has a thing for him.
Guys I confirm it it has a total of 86 chapter, 68 chapter + the side stories, well I can't open it cuz it has a payment on naver so guyssss the spoiler that I assumpt 9n the side characters are maybe not precise, I only read the 68 raw chapters so there's still hope for the black haired cute guy and glasses guy(⌒▽⌒)